Regular Article – Theoretical Physics
Lattice study of form factors for charmonium
School of Science, Xi’an Technological University, Xi’an, 710032, People’s Republic of China
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Accepted: 13 September 2020
Published online: 30 September 2020
Form factors for and have been simulated based on Twisted Mass Lattice Quantum Chromodynamics (Lattice QCD) gauge configurations. We construct particle interpolation operators by variational method that can significantly improve signal-to-noise ratio of correlation functions. We apply twisted boundary conditions to compute corresponding correlation functions which make us obtain form factors with more small four-momentum transfer. Furthermore, we fit charge radius for and , respectively. The results obtained in this simulation could be considered as a ground test to calculate branch ratio decay width of on lattice in future.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020